Lesson · 22 min

Site Safety and Hazard Communication

PPE, chemical safety, and the labelling system every site uses.

By the end of this lesson you can

Select PPE appropriate to a task
Read a safety data sheet and find what you need quickly
Interpret GHS pictograms and signal words
Describe what a site safety orientation should cover

📘 Reading Lesson

Lesson Notes

Read through the key concepts before you try the challenge.

Hazard communication has one purpose: you can find out what you are working with

On the job

You are handed a container to use on site.

The label is worn and the drum was decanted from something larger. Nobody can tell you exactly what is in it. Every chemical on a site is required to be identified and documented, and this one is not.

Your task: Learn what the system requires, so you can tell when it has failed.

OSHA's Hazard Communication Standard gives workers the right to know what chemicals they work with. It requires labelled containers, accessible safety data sheets, and training. The system was aligned with the Globally Harmonized System, which is why labels now carry standard pictograms and a consistent 16-section data sheet format.

Section	Tells you
1 — Identification	What it is and who makes it
2 — Hazards	The pictograms, signal word, and hazard statements
4 — First aid	What to do on exposure — the section to find in an emergency
7 — Handling and storage	How to use and store it safely
8 — Exposure controls / PPE	What protection is required
Signal word	DANGER for more severe hazards, WARNING for less

The SDS sections you will actually use

An unlabelled container is itself a violation, and it is also a practical danger — an SDS is useless if nobody knows which sheet applies. Never use a chemical from a container you cannot identify, and never decant into an unlabelled secondary container. Learn where the SDS binder or terminal is on day one, not on the day someone is splashed.

Hazard	Protection
Falling objects	Hard hat
Flying particles, splash	Safety glasses, goggles, or face shield
Noise above the action level	Ear plugs or muffs, with hearing conservation
Dust, fumes, vapors	Respirator — requires fit testing, medical clearance, and training
Cuts, chemicals, heat	Gloves matched to the specific hazard
Vehicle traffic	High-visibility garment of the correct class

PPE by hazard

Respirators are not simply PPE you put on. Using one requires a medical evaluation, a fit test for the specific make and model, and training — because an unfitted respirator provides far less protection than its rating suggests while feeling entirely adequate. Facial hair that crosses the seal breaks it regardless of fit testing.

Check your understanding

You need to know what to do if a chemical splashes in someone's eyes. Which SDS section do you go to?

Challenge

Apply what you've learned in this lesson.

Work with a real SDS — they are freely available for almost any product.

Find an SDS for a common product and locate sections 2, 4, and 8. Note how long it took.
Learn the nine GHS pictograms and what each signifies.
Research what a respirator fit test involves and how often it must be repeated.
For a job you have done, list every PPE item required and the specific hazard each addresses.

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